Practice Test GeeksLSAT - Law School Admission Test Practice Test
← All LSAT Flashcard Decks

Logic Games: Grouping and Selection Games Flashcards

7 cards from real LSAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Logic Games: Grouping and Selection Games flashcards as text

  1. Nine items are distributed into 3 groups of 3. Item X and Item Y must be in the same group. Item Y and Item Z must be in different groups. If X is in Group 1, which must be true?

    Answer: Y is in Group 2 or 3

    X in Group 1 forces Y to Group 1; Y and Z cannot share a group, so Z must be in Group 2 or 3—meaning Y is in Group 1 (not 2 or 3), but Z is not in Group 1, confirming Z is in Group 2 or 3.

  2. A selection game picks 4 from {A, B, C, D, E, F, G}. Rule: 'If A is selected, then B is selected. If B is selected, then C is selected.' If C is NOT selected, what follows?

    Answer: B and A are both not selected

    Contrapositive chain: not C → not B (from B→C), and not B → not A (from A→B), so both A and B must be excluded.

  3. In a grouping game, 'the number of items in Group 1 is greater than the number in Group 2' restricts distributions to which kind?

    Answer: Distributions where Group 1 has more items than Group 2

    The constraint directly states Group 1 must have more items, eliminating equal or Group-2-majority distributions.

  4. Seven candidates—P, Q, R, S, T, U, V—are selected or rejected for a panel. Exactly 4 are selected. Rule: P and Q are either both selected or both rejected. Rule: R is selected if and only if S is rejected. If P is rejected, which is a valid selection?

    Answer: Q, S, T, U

    P rejected → Q rejected (both-or-neither rule); R selected ↔ S rejected—so Q, S, T, U works with R excluded (S in means R out).

  5. Which of the following best describes an 'in/out' grouping game on the LSAT?

    Answer: Items are assigned to one of two categories: selected or not selected

    An in/out game divides elements into exactly two buckets: those chosen (in) and those not chosen (out).

  6. A game selects 3 from {H, I, J, K, L}. Rule: If H is selected, exactly one of I or J (not both) is selected. If H is selected and I is selected, what must be true?

    Answer: J is not selected

    H selected with I selected triggers 'exactly one of I or J,' meaning J cannot also be selected.

  7. In LSAT logic games, making a 'global deduction' before tackling individual questions is valuable because:

    Answer: It reveals constraints that apply to every valid arrangement

    Global deductions derived from combining rules narrow the solution space for all questions in the game.